Discussion Forum : Solid State
Question -
Na and Mg crystallize in BCC and FCC type crystals respectively, then the number of atoms of Na and Mg present in the unit cell of their respective crystal is
Answer: Option D
:
D
The bcc cell consistes of 8 atoms at the corners and one atom at centre.
∴n=(8×18)+1=2.
The fcc cell consists of 8 atoms at the eight corners and one atom at each of the six faces.This atom at the faces is shared by two unit cells.
∴n=8×18+(6×12)=4
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:
D
The bcc cell consistes of 8 atoms at the corners and one atom at centre.
∴n=(8×18)+1=2.
The fcc cell consists of 8 atoms at the eight corners and one atom at each of the six faces.This atom at the faces is shared by two unit cells.
∴n=8×18+(6×12)=4
Was this answer helpful ?
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